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Showing Spotlights 9 - 16 of 2099 in category (newest first):


The marriage of metal ions and black phosphorus - a new generation of semiconductor transport materials

black_phosphorusDue to its fascinating properties, black phosphorus (BP) has demonstrated appealing potential for not only building (opto)electronic devices, but also in many other areas such as lithium-ion batteries, solar cells, sensors, thermoelectric devices, supercapacitors, and phototherapy. Researchers now have demonstrated that modifying BP with metal ions solved its previous instability problem, which hindered the practical application of BP in electronics and optoelectronics; while at the same time further enhancing the original superior transport properties.

Posted: Mar 7th, 2018

Contact lenses with built-in biofuel cells as power supply

contact_lensesEnzymatic biofuel cells (EBFCs) are bioelectronic devices that utilize enzymes as the electrocatalysts to catalyze the oxidation of fuel and/or the reduction of oxygen or peroxide for energy conversion to electricity. EBFCs have already been demonstrated as wearable epidermal tattoo biosensors and in new work, researchers report the fabrication flexible EBFCs with flexible nanoporous gold electrodes that were modified with lactate oxidase and bilirubin oxidase for use as a lactate/O2 biofuel cell.

Posted: Mar 6th, 2018

The rise of 2D non-layered materials in optoelectronics

optoelectronicsFor the first time, liquid-phase exfoliation (LPE) - a widely explored technique to obtain two-dimensional (2D) layered nano-architectures - has been successfully used to exfoliate tellurium, a non-layered material. The resulting 2D Te nanosheets exhibit excellent photoresponse behavior from the UV to the visible regime in association with strong time and cycle stability for on/off switching behavior. This intriguing finding could help in the search for other 2D materials for innovative applications.

Posted: Mar 5th, 2018

Fluorinated phosphorene: a new way of solving instability problems in phosphorene

phosphoreneRecently, a new member has been introduced to the family of two-dimensional (2D) materials: phosphorene. Phosphorene has attracted much attention because of its tunable direct band gap and superior carrier mobility, but unfortunately phosphorene is subjected to oxidation and degradation under ambient conditions. Now, researchers have reported a facile pathway in obtaining and stabilizing phosphorene through a one-step, ionic liquid-assisted electrochemical exfoliation and synchronous fluorination process. This strategy enabled a novel phosphorene derivative to be discovered - fluorinated phosphorene, which exhibits air-stable photo-thermal properties.

Posted: Mar 2nd, 2018

Controlled release of nanohydrogel from halloysite nanotubes

nanohydrogelA popular structure for the development of nanodelivery systems are hollow tubular nanoparticles. In new work, researchers show that a hydrogel can be confined within the cavity of halloysite nanotubes (HNTs) by means of an easy strategy. The alginate network inside the HNTs cavity can be triggered by chemical stimuli (by calcium chelators) altering the kinetics, which results in the release of the cargo. This shows that halloysite with tunable hydrophilic/hydrophobic interfaces can act as nanotemplate for the synthesis of drug delivery systems based on biopolymer hydrogels.

Posted: Mar 1st, 2018

Promising electrolyte structure designs for solid-state lithium-ion batteries

nanofillerFinding low-cost solid materials capable of efficiently and safely replacing liquid electrolytes in lithium-ion batteries has been a considerable research interest over the past years. Of the various types of solid electrolytes that have been developed so far, composite polymer electrolytes exhibit acceptable Li-ion conductivity due to the interaction between nanofillers and polymer. By fabricating a pre-percolated network of ceramic filler instead of distributing particles in polymer, a 3D interconnected ceramic framework provides continuous pathways for ion conduction. This novel method will help to develop composite materials in a different but much improved way than conventional particle distributions.

Posted: Feb 28th, 2018

Light-activated black phosphorus hydrogel releases cancer drugs

cancer_nanomedicineAs a new member of the two-dimensional (2D) nanomaterial family, black phosphorus (BP) has attracted considerable attention in biomedicine, due to its unique physicochemical properties as well as excellent biocompatibility. Researchers have now demonstrated a novel concept of light activation of BP hydrogel to release drugs for cancer therapy. This BP hydrogel is comprised of BP nanosheets as a photosensitizer and hydrogel as a hydrophilic container for drugs. After injection, these nanosheets convert light to thermal energy when exposed to laser irradiation, leading to heating of the hydrogel matrix.

Posted: Feb 27th, 2018

Back to the future: Belgian nanomaterials register retroactively amended

The Belgian federal government unnecessarily delayed the adoption of the Amending Royal Decree until December 2017 and published it only mid-January 2018. It creates legal uncertainty where it should have been avoided. The Belgian nanomaterials register symbolizes a Belgian exceptionalism in the small world of national nanomaterials registers. Unlike France, Denmark and Sweden, Belgium decided from the very beginning to have three different deadlines for substances, mixtures and articles.

Posted: Feb 26th, 2018